Tubing and casing hook.



L. G. SANDS.

TUBING AND CASING HOOK.

APPLICATION FILED 111M124, 1909.

950,641 Patented Mar. 1,1910.

ANCHEW u ummwl cu wow UYNLGWAPHEM; "wsumumn o c LOUIS O. SANDS, OFPITTSBURG, PENNSYLVANIA.

TUBING AND CASING HOOK.

Specification of Letters Patent.

Patented Mar. 1, 1910.

Application filed June 24, 1909. Serial No. 504,055.

hooks, which, in Artesian and oil well drill-.

ing, are used in conjunction with tubing and casing elevators forhandling strings of tubing or casing.

The object of this invention is the provision of a bail and guard forthe hook, whereby the handling of the hook and its engagement with theelevator are facilitated, and its accidental disengagement therefromprevented, thus adding to the safety of the operator.

These tubing and easing hooks are often required to sustain great loadsand strains in handling strings of tubing or casing, and

are therefore made correspondingly heavy, the average weight beingbetween one hundred pounds and three hundred pounds, while frequentlythey will greatly exceed that, even up to eighteen hundred pounds inweight. Again, when in use for lowering strings of tubing or easing intothe well, in case of lodgment of the casing at any point in the well theslack in the cable incident thereto tends to the disengagement of thehook from the elevator, and when thus released from control the casingmay again start and being unrestrained may be clamaged by coming inviolent contact with the bottom of the well. It is therefore obviousthat to protect both the operator and the casing from injury, it isdesirable to have not only means for facilitating the manipulation ofthe hook when not loaded and for insuring proper engagement of the hookwith the bails or reins of the elevator without exposing the hands ofthe operator, but also to have means for preventing the accidentaldisengagement of the hook from the bails or reins of the elevator whenloaded. To efi'ect these several purposes I combine with a hook, amember so mounted thereon as when it is in one position it will engagethe point of the hook and constitute a guard to confine the elevatorreins within the bighl: of the hook, and when in another position itwill constitute a bail atthe baek of the hook whereby the hook may becontrolled and guided into engagement with the bails of. the elevator,and such a construction embodies the main feature of my invention.

There are other, minor, features of invention residing in particularcombinations and elemental constrturtion, all as will hereinafter morefully appear.

In the drawings chosen for the purpose of illustrating my invention, thescope of which will be pointed out in the claims, Figure 1 a view inside elevation of a double swivel tubing or casing hook embodying myinvention in its preferred form, shown in connection with an elevatorand the upper end of a string of easing constituting the load on thehook. In this figure the flexible member is shown in full lines arrangedas a guard to prevent the t'lisengagement of the hook from the elevator,and in dotted lines as arranged to constitute a bail for manipulatingthe hook. Fig. is a view similar to l ig. 1, showing the flexiblemen'iber in full lines arranged as a bail for use in manipulating thehook, the hook being disengaged from the elevator. Fig. is a detachedside elevation of the preferred form of the flexible mem ber. F et is adetached plan view of the preferred form of flexible member shown inFig. 3, and, Fig. 5 is a view in side elevation of a single swivel hook,and a modified form of flexible guard and bail member.

Like symbols refer to like parts wherever they occur.

I will now proceed to describe my invention more fully so that othersskilled in the art to which it appertains may apply the same.

In the drawings, A indicates the upper end of a string of casing and athe coupling thereon, B the hinged members of an elevator, b the latchtherefor, and C C the bails or reins of the elevator with which thetubing or casing hook D engages.

The tubing or casing hook D may be of the usual or any approved form ofdouble or single swivel hook, and of such size or weight as the servicedemanded of it requires. At the point (Z of the hook provision is madefor detachably securing one end of a flexible guard and bail memberl,.as at 1, while opposite thereto at the back it of the hook provisionis made for the attachment of tit) said flexible guard and bail member4, as at 2, and below the said last named point of attachment 2 at theback it of the hook provision is made for detachably securing theflexible guard and bail member, as at 3,

when shifted from its connection with the point of the hook. A sectionof wire cable is preferably employed for the flexible guard and bailmember, and in such case it is passed through an opening at 2 in theback it of the hook, is provided at midlength, where it passes throughthe hook, with a sleeve or guard 5 to protect it against wear, and atits ends with eyes 6, 6 for the reception of a bolt 7 which passesthrough a hole at 1 in the point Z of the hook, whereby the end of theflexible member l is detachably connected with the point (Z of the hookwhen arranged as a guard. By removing the bolt 7 from the hole in thepoint (Z of the hook and the eyes 6, 6 on the ends of the flexiblemember 4:, said ends of the flexible members may be shifted down to thelower hole 3 at the back lb of the hook and secured at said point by thebolt 7 so as to constitute a bail for manipulating the hook. In lieu ofthe wire cable flexible member, a chain as indicated at Q in Fig. 5 maybe employed either on one or on both sides of the hook and secured bybolts 7 or equivalent means so as to be readily attachable to anddetachable from the point (Z and back h of the hook D as hereinbeforespecified.

It will be obvious to those skilled in the art of well drilling that theprovision of a flexible guard and bail attachment for tubing and casinghooks will be of material advantage to the operator in enabling him toavoid physical discomfort and danger in manipulating the hook, as wellas guarding against loss from accidental disengagement of the casinghook and elevator in handling strings of casing. I

Having thus described my invention, what I claim and desire to secure byLetters Patent is z' 1. The combination with a hook, of a movable membermounted on the back thereof, and means for detachably connecting saidmember with the point of the hook to form a guard and also with the backof the hook at a second place to form a bail for the hook.

2. The combination with a hook, of a flexible member movably mounted onthe back thereof, and means for detachably connecting said flexiblemember with the point of the hook to form a guard and also with the backof the hook to form a bail for the hook.

3. The combination with. a hook having holes at its point and at itsback, of a flexible member provided with eyes said member attached tothe back of the hook, and a bolt or pin for detachably connecting saidflexible member with the point of the hook through one of said holes toform a guard and also with the back of the hook through the other holeto form a bail.

4. The combination with a hook having holes at the point and at the backthereof, a section of wire cable attached to the back of said hook andhaving eyes at its ends, said cable constituting a flexible member, and.a bolt or pin for detachably connecting said flexible member with thepoint of the hook through one of said holes to form a guard and alsowith the back of the hook through the other hole to form a bailtherefor.

5. The combination with a hook having a hole at its point and aplurality of holes at its back, of a section of wire cable which passesthrough one of said holes-at the back of the hook and constitutes aflexible member, a guard for said flexible member where it passesthrough the hook, and means for detachably connecting the ends of saidflexible member with the point of the hook through one of said holes toform a guard and with the back of the hook through the other hole toform a bail therefor.

In testimony whereof I affix my signature, in presence of twosubscribing witnesses.

LOUIS C. SANDS.

\Vitnesses A. G. Hneenivi, R. A. STEWART.

